Mint 5200 Will not charge in the Fast cradle but ok on the r

Hello Folks… PLEASE HELP.
I have a Mint 5200 also known as irobot braava 380t

The problem started a few days ago

If I place the Mint on the fast charging cradle it will not (sing) and start charging at all…

If I plug the adapter direct to the Mint charging port no problem it will show the charging light pulsating and it charges …

I bought a new cradle, no dice

a new battery no dice…

Could it be the motherboard , or is it the battery charging board inside the mint?..

All functions are no problem , everything works ok…

PLEASE help

thank you so much

It is certainly possible the issue is due to a problem from charging board between the motor board and the cradle.

is the motherboard available for these things and how much is it?..

Unfortunately it is not available in our catalog. We would suggest taking a look at third party website such as eBay.